First, the bean absorbs water and expands, then the germ rises through the seed coat and extends, then the radicle extends and enters the soil, the seed kernel breaks through the mulch and roads out of the ground, the cotyledons extend to absorb sunlight and send out the true leaves, which stretch out and continue to grow up high, after the fifth true leaf is sent out, the cotyledons turn yellow and shrivel up and finish off, and the true leaves are 3-pinnate and continue to grow up high, the axils of the leaves give birth to florets, and the flowers open up in red or white, and the florets shrivel up and fall off, the pods grow, the growing point shrivels up, and the plant stops growing up high. The pods grow, the growing point shrinks, the plant stops growing to the heights, the pods grow gradually, from green to yellow, from yellow to brown, the leaves also begin to change from green to yellow, shriveling, falling off, the plant dies and dries up, at this time the plant is mature and should be harvested!